致倦库蚊
马拉硫磷
毒理
幼虫
龄期
生物
库蚊
人口
丝虫病
按蚊
急性毒性
兽医学
传统医学
杀虫剂
植物
毒性
埃及伊蚊
生态学
医学
动物
蠕虫
免疫学
内科学
环境卫生
疟疾
作者
Nahla O. M. Ali,Fathi Mohamed Ahmed Elrabaa
出处
期刊:PubMed
日期:2010-11-01
卷期号:14 (11): 925-33
被引量:10
摘要
Searching for potent plant larvicides, crude aqueous extract of the latex of Uschar (Calotropis procera) and Labakh (Ficus benghalensis) were tested against the fourth instar larvae of the lymphatic filariasis vector Culex quinquefasciatus (Diptera: Culicidae) using the conventional methods recommended by the WHO. Likewise, the toxicity level of Malathion was tested. The dose/response mortality relationship was statistically determined using double transformation regression analysis. The 24-hour LC50 of the test agents was taken as a measure of its acute toxicity. The 24-hour LC50 of Malathion to the larvae was 2.2693 mg/L. The most potent plant extract was the latex of Uschar which killed 50% of the larval population at a concentration of 0.0062% (V/V).The 24-hour LC50 of Labakh latex was 0.4796% (V/V). A range of concentration extending between 0.0195 and 10% (W/V) of the Labakh fruits (figs) produced more or less the same % of mortality (25%).Since the latex of the plants tested are hazardous to man and his animals, it is recommended that these extract must be used in bodies of water not accessible to man or animals such as pit latrines and septic tanks.
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